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If you're dead set on giving away money, you can give me some money and I'll sell you some OSS that'll do the trick.
–
wombleJul 27 '11 at 22:40

5 Answers
5

Our office uses the spam blocking feature from WatchGuard firewalls, this way we don't need another device on the network. You could also look to external services that block email before hitting your network like Securence or Postini (albeit Postini support is non-existent).

But I'm also entertaining the idea of using a used Barracuda. I've sold and deployed plenty of new spam units, but the license policy is a bit ridiculous (non-transferrable, very unfriendly). Plus, costs have gone way up. There are plenty of used units on eBay, and I think the only downside is not being able to get appliance firmware updates and virus definitions. I believe the Barracuda Central is a standard RBL, and the Bayesian database functionality is still there, so perhaps that could work for you.